MC Discord crash recovery script

crash_recovery_script.bat

@echo off
setlocal enabledelayedexpansion

:: Configuration
set MAX_CRASHES=3
set CRASH_COUNT=0
set SERVER_BAT=run.bat
set WEBHOOK_URL={DISCORD_WEBHOOK_URL}

:: Get current directory for local file path
set CURRENT_DIR=%cd%

:: Check if run.bat exists
if not exist "%SERVER_BAT%" (
    echo ERROR: %SERVER_BAT% not found in current directory!
    echo Please make sure this script is in the same folder as your run.bat file.
    pause
    exit /b 1
)

echo Minecraft Server Auto-Restart Monitor
echo ====================================
echo Max crashes before giving up: %MAX_CRASHES%
echo Server batch file: %SERVER_BAT%
echo Discord webhook configured
echo.

:start_server
set /a CRASH_COUNT+=1
echo [%date% %time%] Starting server (Attempt %CRASH_COUNT%/%MAX_CRASHES%)

:: Send Discord notification for server start attempt
if %CRASH_COUNT% gtr 1 (
    call :send_discord_message "🔄 **Server Restart Attempt**" "Attempting to restart Minecraft server (Attempt %CRASH_COUNT%/%MAX_CRASHES%)\n\n📁 Server location: `%CURRENT_DIR%`" "16776960"
)

:: Record start time for uptime tracking
for /f "tokens=1-4 delims=:.," %%a in ("%time%") do (
    set /a "start_seconds=((%%a*60)+%%b)*60+%%c"
)

:: Start the server and wait for it to finish
call "%SERVER_BAT%" nogui

:: Calculate uptime to help determine if this was a manual stop
for /f "tokens=1-4 delims=:.," %%a in ("%time%") do (
    set /a "end_seconds=((%%a*60)+%%b)*60+%%c"
)
set /a "uptime_seconds=end_seconds-start_seconds"
if %uptime_seconds% lss 0 set /a "uptime_seconds+=86400"

:: Check the exit code and uptime to determine shutdown type
if %errorlevel% equ 0 (
    echo [%date% %time%] Server shut down normally (uptime: %uptime_seconds% seconds). Exiting monitor.
    if %uptime_seconds% gtr 30 (
        call :send_discord_message "✅ **Server Shutdown**" "Minecraft server shut down normally after running for %uptime_seconds% seconds.\nAuto-restart monitor stopping.\n\n📁 Server location: `%CURRENT_DIR%`" "65280"
    ) else (
        call :send_discord_message "⚠️ **Quick Server Exit**" "Server exited quickly (%uptime_seconds% seconds) with code 0.\nThis might indicate a startup issue.\nAuto-restart monitor stopping.\n\n📁 Server location: `%CURRENT_DIR%`" "16776960"
    )
    goto end
) else (
    echo [%date% %time%] Server crashed with exit code %errorlevel%
    
    :: Send crash notification
    call :send_discord_message "💥 **Server Crashed**" "Minecraft server crashed with exit code %errorlevel%\nCrash #%CRASH_COUNT% of %MAX_CRASHES%\n\n📁 Server location: `%CURRENT_DIR%`" "16711680"
    
    :: Check if we've reached the maximum number of crashes
    if %CRASH_COUNT% geq %MAX_CRASHES% (
        echo [%date% %time%] Maximum crash limit reached (%MAX_CRASHES%). Giving up.
        echo Server will not be restarted automatically.
        call :send_discord_message "🚨 **Max Crashes Reached**" "Server has crashed %MAX_CRASHES% times. Auto-restart disabled.\nManual intervention required.\n\n📁 Server location: `%CURRENT_DIR%`" "8388608"
        goto end
    ) else (
        set /a REMAINING=!MAX_CRASHES! - !CRASH_COUNT!
        echo [%date% %time%] Restarting server... (!REMAINING! attempts remaining)
        echo Waiting 10 seconds before restart...
        timeout /t 10 /nobreak >nul
        goto start_server
    )
)

:end
echo.
echo Auto-restart monitor has stopped.
pause
exit /b 0

:: Function to send Discord webhook message
:send_discord_message
set "title=%~1"
set "description=%~2"
set "color=%~3"

:: Create temporary JSON file
set "temp_json=%temp%\discord_webhook.json"

:: Write JSON payload to temp file
(
echo {
echo   "embeds": [
echo     {
echo       "title": %title%,
echo       "description": %description%,
echo       "color": %color%,
echo       "timestamp": "%date%T%time%",
echo       "footer": {
echo         "text": "Minecraft Server Monitor"
echo       }
echo     }
echo   ]
echo }
) > "%temp_json%"

:: Send webhook using curl (if available) or PowerShell as fallback
curl --version >nul 2>&1
if %errorlevel% equ 0 (
    curl -H "Content-Type: application/json" -d @"%temp_json%" "%WEBHOOK_URL%" >nul 2>&1
) else (
    :: Fallback to PowerShell
    powershell -Command "try { Invoke-RestMethod -Uri '%WEBHOOK_URL%' -Method Post -ContentType 'application/json' -Body (Get-Content '%temp_json%' -Raw) } catch { Write-Host 'Failed to send Discord notification' }"
)

:: Clean up temp file
del "%temp_json%" >nul 2>&1

goto :eof